MICRO TACHOMETER

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1.It looks fancy and compact in size.Very handy to use.2.It measures 2 ~ 9 blades prop rpm.3.It shows 4 digits in a 0 ~ 9999 rpm range.Multiply the readout by 10 for final rpm reading.4.It comes with a replaceable 3V LITHIUM battery.5.There is an auto shut-off function after five minutes when no signal received.6.When the LOW BATTERY icon is on;the battery needs to be replaced.7.It needs a little electronic power (0.02mA) when the tachometer is not in use.This depends on battery\'s capacity for life of battery.8.Display and memorize the maximum rpm value.